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Method for improving optical quality of optical grating external cavity laser

A technology of optical quality and lasers, which is applied in the field of optoelectronics and optics, can solve the problems of multiple lasing peaks, broadening of spectral linewidth, and degradation of optical quality of grating external cavity lasers, so as to reduce spectral linewidth and improve optical quality. The effect of quality and strong practical application value

Inactive Publication Date: 2011-05-11
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Due to the optical mode of the gain device in the system and the existence of dispersion, distortion, aberration and many other factors in the optical components, the optical quality of the grating external cavity laser is degraded, especially the widening of the spectral linewidth, and even the appearance of multiple lasing peaks.

Method used

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  • Method for improving optical quality of optical grating external cavity laser
  • Method for improving optical quality of optical grating external cavity laser
  • Method for improving optical quality of optical grating external cavity laser

Examples

Experimental program
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Embodiment 1

[0023] Embodiment 1 (applied to Littrow optical path)

[0024] Please refer to figure 1 and image 3 .

[0025] The diaphragm 21 is installed in the optical path of the Littrow grating external cavity laser composed of the grating 22, the lens 23 and the gain device 24, by properly selecting the form of the diaphragm 21 and adjusting the size of the diaphragm 21 and its external The position in the optical path of the cavity can effectively reduce the spectral width of the output laser and improve its optical quality.

[0026] The above-mentioned aperture 21 can adopt (but not limited to) the form of a circle 1a and a rectangle 1b, and its size, such as the diameter of the circle 1a or the length and width of the rectangle 1b, can be appropriately selected according to actual needs.

Embodiment 2

[0027] Embodiment 2 (applied to Littman optical path)

[0028] Please refer to figure 1 and Figure 4 .

[0029] Diaphragm 31 is installed in the light path of Littman (Littman) grating external cavity laser that is made up of grating 32, reflecting mirror 33, lens 34, gain device 35, by selecting the form of diaphragm 31 appropriately and adjusting the form of diaphragm 31 The size and its position in the optical path of the external cavity can effectively reduce the spectral width of the output laser and improve its optical quality.

[0030] The above-mentioned aperture 31 can be in the form of (but not limited to) a circle 1a and a rectangle 1b, and its size, such as the diameter of the circle 1a or the length and width of the rectangle 1b, can be appropriately selected according to actual needs.

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Abstract

The invention discloses a method for improving the optical quality of an optical grating external cavity laser, wherein an optical grating (1) is mounted in the conventional optical path (2) so as to improve the optical quality of the optical grating external cavity laser, and particularly reduce spectral line width. The method for improving the optical quality of the optical grating external cavity laser and particularly reducing spectral line width is simple and effective and has rather high practical application value.

Description

technical field [0001] The invention relates to the technical fields of optics and optoelectronics, in particular to a method for improving the optical quality of a grating external cavity laser. Background technique [0002] Grating external cavity laser is a kind of tunable laser source made with external diffraction grating as feedback and mode selection element. This type of laser source has the advantages of small size, high efficiency, narrow linewidth, and wide-range tunable wavelength. It is widely used in optical fiber communication, high-resolution spectral analysis, metrology detection, biomedicine, environmental monitoring and other fields. Among them, spectral linewidth is an important feature of grating external cavity laser, which mainly depends on the gain, loss and guided wave characteristics of the entire optical system. [0003] Due to the optical mode of the gain device in the system and many factors such as dispersion, distortion, and aberration of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10H01S5/06
Inventor 吕雪芹金鹏王占国
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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